🎥🔊 Video_Conference_App

A lightweight, full-duplex video and audio conferencing application built in C++ using OpenCV for video handling and PortAudio for real-time audio streaming over UDP sockets.

This project demonstrates low-level networking, media capture, encoding/decoding, and multithreaded programming — all without using external frameworks.

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📂 Project Structure

Video_Conference_App/
├── server/
│   ├── server.cpp          # Server-side implementation (acts as host)
│   ├── CMakeLists.txt
│
├── client/
│   ├── client.cpp          # Client-side implementation (connects to host)
│   ├── CMakeLists.txt

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⚙️ Features

• 📡 UDP-based packet transmission (low latency)
• 🧠 Dynamic peer discovery (server auto-detects client IP)
• 🔊 Real-time full-duplex audio using PortAudio
• 📹 Real-time video streaming using OpenCV (encoded via JPEG)
• 🧵 Multithreaded design for concurrency (audio/video/networking)
• 🔐 Custom packet tagging to separate audio and video

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✅ Requirements

Make sure your system has the following dependencies installed:

Dependency	Ubuntu/Debian Install Command
OpenCV	Follow Steps Given In Here
PortAudio	Follow Steps Given In Here
CMake	sudo apt install cmake
g++ Compiler	sudo apt install g++

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🚀 How to Build & Run

Step 1: Clone the Repository

git clone https://github.com/Vikas2171/Video_Conference_App.git
cd Video_Conference_App

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Step 2: Build the Server

cd server
mkdir build && cd build
cmake ..
make
./server

The server listens on port 6000 and waits for the client to connect.

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Step 3: Build the Client

Open a new terminal:

cd Video_Conference_App/client
mkdir build && cd build
cmake ..
make
./client

The server will automatically detect the client's IP when it receives the first packet, and then begin full-duplex communication.

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📝 Notes

• Both client and server use the default webcam and microphone.
• Audio is streamed in float32 stereo format at 44100 Hz.
• Video is sent as JPEG frames (compressed to reduce bandwidth).
• Server IP is hardcoded in client.cpp — ensure it's reachable from the client.

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🔧 Troubleshooting

• PortAudio not found?
  Make sure you installed portaudio by following the given steps.

• Video feed not working?
  Ensure your webcam is available and not being used by another application.

• Audio not playing?
  Check if microphone access is enabled in system sound settings. Use pavucontrol (PulseAudio Volume Control) to verify device permissions.